Home / 28,151.76-42,168-18,261.60

Finding the Fourth Proportional to 28,151.76, 42,168 and 18,261.60

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Solution

The fourth proportional to 28,151.76, 42,168 and 18,261.60 is: 27,353.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,151.76 : 42,168 = 18,261.60 : x
  2. Step 2: Convert to fraction form
    28,151.76/42,168 = 18,261.60/x
  3. Step 3: Cross multiply
    28,151.76x = 42,168 × 18,261.60
  4. Step 4: Simplify right side
    28,151.76x = 770,055,148.80
  5. Step 5: Solve for x
    x = 770,055,148.80/28,151.76
  6. Step 6: Final answer
    x = 27,353.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.